Rivers, an eight-time Pro Bowler, has spent his entire 16-season NFL career with the Chargers. He ranks sixth in NFL history in both passing yards (59,271) and touchdowns (387). He's started every game for the Chargers since 2006, and his 224 consecutive starts rank second all time.
The 38-year-old, who holds a 123-101 regular-season record, is coming off a disappointing 2019 season, in which he led the Chargers to five wins while throwing 23 touchdowns against 20 interceptions.
The Colts lost Andrew Luck to a shock retirement prior to the 2019 season and relied on Jacoby Brissett under center. The club struggled, winning only seven games, despite Brissett starting the season with solid performances.
The 27-year-old Brissett, who's signed through 2020, amassed 2,942 yards and 18 touchdowns while throwing six interceptions last year. He also had four scores on the ground and lost five fumbles.